I currently have limited electronics experience. I am planning to use mains power through relays for climate control, so considering the risk, I would like to check to see if these relays are appropriately connected to receive mains power.
I have two relays. One relay will take 600W (a heater) while the other will have 50W/0.2A (a fan).
The relay module is: https://www.auselectronicsdirect.com.au/assets/files/(ST1080)5V%20Relay%20module.pdf There seems to be a resistor inbuilt into the casing, and according to the packet (but not the PDF) there is inbuilt Back-EMF protection.
My concern is that it may not be protected against inrush, uses screw terminals, and may not be isolated.
Any advice will be appreciated. Once again, I will not run mains power through it until I am sure of it being safe.